<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on"
             label-position="left">

      <div class="title-container">
        <img class="logo" :src="logo"/>
        <h1 class="title">{{ title }}</h1>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user"/>
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          autocomplete="on"
        />
      </el-form-item>

      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password"/>
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="Password"
            name="password"
            tabindex="2"
            autocomplete="on"
            @keyup.native="checkCapslock"
            @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"/>
          </span>
        </el-form-item>
      </el-tooltip>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
                 @click.native.prevent="handleLogin">登录
      </el-button>

      <div style="position:relative">
        <div class="tips">
          <span>请使用</span><a style="color: #ffa93c" href="http://130.39.110.74/qgyxcgyw" target="_blank">法官之家</a><span>账号登录</span>
        </div>
        <!--add other tips vertically by adding <div class="tips"> or horizontally by adding <span> -->
      </div>
    </el-form>


  </div>
</template>

<script>
import {validUsername,validPassword} from '@/utils/validate'
import SocialSign from './components/SocialSignin'

export default {
  name: 'Login',
  components: {SocialSign},
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('请输入账号'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (!validPassword(value)) {
        callback(new Error('请输入密码'))
      } else {
        callback()
      }
    }

    return {
      logo: '/static/images/court-logo.svg',
      title: '全国法院文稿送审系统',
      loginForm: {
        //默认值
        username: 'admin',
        password: 'nanda'
      },
      //通过:rules绑定在el-form上
      loginRules: {
        username: [{required: true, trigger: 'blur', validator: validateUsername}],
        password: [{required: true, trigger: 'blur', validator: validatePassword}]
      },
      passwordType: 'password',
      capsTooltip: false,
      loading: false,
      redirect: undefined,
      otherQuery: {}
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        const query = route.query
        if (query) {
          this.redirect = query.redirect
          this.otherQuery = this.getOtherQuery(query)
        }
      },
      immediate: true
    }
  },
  created() {

  },
  mounted() {
    if (this.loginForm.username === '') {
      this.$refs.username.focus()
    } else if (this.loginForm.password === '') {
      this.$refs.password.focus()
    }
  },
  destroyed() {
    // window.removeEventListener('storage', this.afterQRScan)
  },
  methods: {
    checkCapslock(e) {
      const {key} = e
      this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
    },
    //通过改变输入框type，显示或隐藏密码明文
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },

    // 处理登录@click.native.prevent="handleLogin"
    //.native 是给组件绑定原生事件，只能用在组件上，不可以用在原生元素上。
    // （大概意思就是在父组件上给引进的子组件绑定点击事件是没有效果，除非加上.native或者子组件通过this.$emit传递过去）
    //.prevent是用来阻止默认的事件。就相当于…event.preventDefault()。
    handleLogin() {
      //相当于调用:rules绑定的验证方法
      //相关解释 https://blog.csdn.net/weixin_39107711/article/details/105198190
      //https://blog.csdn.net/qq_45791799/article/details/122978728
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm)
            .then(() => {
              this.$router.push({path: this.redirect || '/', query: this.otherQuery})
              this.loading = false
            })
            .catch(() => {
              this.loading = false
            })
        } else {
          return false
        }
      })
    },
    getOtherQuery(query) {
      return Object.keys(query).reduce((acc, cur) => {
        if (cur !== 'redirect') {
          acc[cur] = query[cur]
        }
        return acc
      }, {})
    }

  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-button {
    font-family: Consolas, 幼圆, sans-serif; //serif字体保证在任何系统上字体缺失的情况下能正常显示
    font-size: 18px;

  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      margin: 0 5px;
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;

    .logo {
      height: 65px;
      width: 65px;
      margin-right: 5px;
    }

    .title {
      display: inline-block;
      font-size: 35px;
      color: $light_gray;
      text-align: center;
      font-weight: bold;
      margin-left: 5px;

    }

  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }


}
</style>
